The Oura Ring 4 is now official and it brings a slew of improvements compared to the outgoing Gen 3 version from three years ago. Oura Ring 4 features a fully titanium exterior and interior ditching the epoxy interior of its predecessor. The new device is 2.88mm thick and weighs between 3.3 and 5.2 grams depending on the ring size. It is also water resistant up to 100m. The sensors inside are a lot slimmer measuring just 0.3mm compared to 1.3mm on the Ring Gen 3 and they don’t stick out. And while the sensors have shrunk, Oura is promising improved accuracy. Oura claims a...
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